The moisture meter can quickly measure the moisture content of the grain. 1. 7-inch design: This is an empty 7-inch receiving roller designed for use with a reel-to-reel tape recorder. The spool fits any open spool platform with a tape diameter of 1/4 7 in. 2. Aluminum alloy material: 1/4 7 inch hollow coil strip is made of aluminum alloy, which is wear-resistant, corrosion-resistant and not easy to damage, and has a long service life. 3. 3-hole wind-resistant holes: The empty roll features a NAB aluminum flange with a 3-hole wind-resistant hole, designed to increase bending resistance and strength. 4. Ideal replacement: Empty 1/4 7 inch tape spool for repairing recorder or replacing with new spool, providing excellent sound quality such as recording, erasing, re-recording, etc. 5. Excellent performance: An empty spool with 1/4 7 inch tape with high performance, low noise and provides the sound and characteristics of the tapes you know and love. . NAB REEL-TO-REEL TAPE RECORDER 1/4 7"3HOLES RED . NAB REEL-TO-REEL TAPE RECORDER 1/4 7"3HOLES RED Specification: Item Type: 1/4 7 Inch Empty Roll Tape Material: Aluminum Alloy Applicable Tape: 1/4 inch Roll Diameter: 7 inches Number of Holes: 3 Holes Application: universal . NAB REEL-TO-REEL TAPE RECORDER 1/4 7"3HOLES RED . NAB REEL-TO-REEL TAPE RECORDER 1/4 7"3HOLES RED List of packages: 1x1/4 7 Inch Empty Roll Tape Install and use. . NAB REEL-TO-REEL TAPE RECORDER 1/4 7"3HOLES RED . NAB REEL-TO-REEL TAPE RECORDER 1/4 7"3HOLES RED